I tried to use `installUpdateListener` to listen for status changes, but it note emit anything. I think it because listener registered inside `onAttachedToEngine` while `appUpdateManager` not yet ready. See this [code](https://github.com/jonasbark/flutter_in_app_update/blame/0fdaf4c7368605f919b7c2c8cee4d1531469c979/android/src/main/kotlin/de/ffuf/in_app_update/InAppUpdatePlugin.kt#L67)
